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Table 1 Ligands and binding protocols used for receptor autoradiography

From: Multireceptor fingerprints in progressive supranuclear palsy

Transmitter

Receptor

[3H]-Ligand

Displacer

Incubation buffer

Preincubation

Main incubation

Final rinsea

Glutamate

AMPA

AMPA

[10 nM]

Quisqualate

[10 μM]

50 mM Tris-acetate (pH 7.2)

+100 mM KSCNb

3 × 10 minutes, 4 °C

45 minutes, 4 °C

1. 4 × 4 seconds

2. Acetone/glutaraldehyde (100 ml/2.5 ml), 2 × 2 seconds, 4 °C

 

Kainate

Kainate

[9.4 nM]

SYM 2081

[100 μM]

50 mM Tris-acetate (pH 7.1)

+ 10 mM Ca2+-acetate

3 × 10 minutes, 4 °C

45 minutes, 4 °C

1. 4 × 4 seconds, 4 °C

2. Acetone/glutaraldehyde (100 ml/2.5 ml), 2 × 2 seconds, 4 °C

 

NMDA

MK-801

[3.3 nM]

(+)MK-801

[100 μM]

50 mM Tris-acetate (pH 7.2)

+ 50 μM glutamate

+ 30 μM glycineb

+ 50 μM spermidineb

15 minutes, 4 °C

60 minutes, 22 °C

2 × 5 minutes

 

mGlu2/3

LY341495

[1 nM]

l-Glutamate

[1 mM]

10 mM phosphate buffer (pH 7.6)

+ 100 mM KBrb

2 × 5 minutes, 22 °C

60 minutes, 4 °C

2 × 5 minutes

GABA

GABAA

Muscimol

[7.7nM]

GABA

[10 μM]

50 mM Tris-citrate (pH 7.0)

3 × 5 minutes, 4 °C

40 minutes, 4 °C

3 × 3 seconds

 

GABAB

CGP 54626

[2 nM]

CGP 55845

[100 μM]

50 mM Tris-HCl (pH 7.2)

+ 2.5 mM CaCl2

3 × 5 minutes, 4 °C

60 minutes, 4 °C

3 × 2 seconds

 

BZ

Flumazenil

[1 nM]

Clonazepam

[2 μM]

170 mM Tris-HCl (pH 7.4)

15 minutes, 4 °C

60 minutes, 22 °C

2 × 1 seconds

 

pBZ

PK 11195

[0.1 nM]

PK 11195

[10 μM]

50 mM Tris-HCl (pH 7.4)

15 minutes, 22 °C

60 minutes, 22 °C

3 × 5 minutes

Acetylcholine

M1

Pirenzepine

[1 nM]

Pirenzepine

[2 μM]

Krebs buffer (pH 7.4)

+ 4 mM KCl

+ 120 mM NaCl

15 minutes, 22 °C

60 minutes, 22 °C

3 × 4 minutes

 

M2

Oxotremorine-M

[1.7 nM]

Carbachol

[10 μM]

20 mM HEPES-Tris (pH 7.5)

+ 10 mM MgCl2

+ 300 nM pirenzepine

20 minutes, 22 °C

60 minutes, 22 °C

2 × 2 minutes

 

M3

4-DAMP

[1 nM]

Atropine sulfate

[10 μM]

50 mM Tris-HCl (pH 7.4)

+ 0.1 mM PMSF

+ 1 mM EDTA

15 minutes, 22 °C

45 minutes, 22 °C

2 × 5 minutes

 

nACh

Epibatidine

[0.5 nM]

Nicotine

[100 μM]

1 mM HEPES (pH 7.5)

+ 120 mM NaCl

+ 5.4 mM KCl

+ 0.8 mM MgCl2

+ 1.8 mM CaCl2

20 minutes, 22 °C

90 minutes, 22 °C

5 minutes

Noradrenaline

α1

Prazosin

[0.2 nM]

Phentolamine mesylate

[10 μM]

50 mM Na+/K+-phosphate buffer (pH 7.4)

15 minutes, 22 °C

60 minutes, 22 °C

2 × 5 minutes

 

α2

UK 14,304

[0.64 nM]

Phentolamine mesylate

[10 μM]

50 mM Tris-HCl (pH 7.7)

+ 100 μM MnCl2

15 minutes, 22 °C

90 minutes, 22 °C

5 minutes

Serotonin

5-HT1A

8-OH-DPAT

[1 nM]

5-Hydroxytryptamine

[1 μM]

170 mM Tris-HCl (pH 7.4)

+ 4 mM CaCl2 b

+ 0.01% ascorbateb

30 minutes, 22 °C

60 minutes, 22 °C

5 minutes

 

5-HT2

Ketanserin

[1.14 nM]

Mianserin

[10 μM]

170 mM Tris-HCl (pH 7.7)

30 minutes, 22 °C

120 minutes, 22 °C

2 × 10 minutes

Dopamine

D1

SCH 23390

[1.67 nM]

SKF 83566

[1 μM]

50 mM Tris-HCl (pH 7.4)

+ 120 mM NaCl

+ 5 mM KCl

+ 2 mM CaCl2

+ 1 mM MgCl2

20 minutes, 22 °C

90 minutes, 22 °C

2 × 10 minutes

 

D2

Raclopride

[0.55 nM]

Butaclamol

[1 μM]

50 mM Tris-HCl (pH 7.4)

+ 0.1% ascorbate

+ 150 mM NaCl

20 minutes, 22 °C

45 minutes, 22 °C

6 × 1 minutes

Adenosine

A1

DPCPX

[1 nM]

R-PIA

[100 μM]

170 mM Tris-HCl (pH 7.4)

+ 2 U/L adenosine deaminase

+ 100 μM Gpp(NH)pb

15 minutes, 4 °C

120 minutes, 22 °C

2 × 5 minutes

 

A2A

ZM 241385

[0.42 nM]

2-Chloroadenosine

[20 μM]

170 mM Tris-HCl (pH 7,4)

+ 2 U/L adenosine deaminase

+ 10 mM MgCl2

2 × 10 minutes, 22 °C

120 minutes, 22 °C

2 × 5 minutes

  1. Abbreviations: A 1 Adenosine receptor type 1, A 2A Adenosine receptor type 2A, α 1 Adrenoceptor type 1, α 2 Adrenoceptor type 2, AMPA α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid, BZ γ-Aminobutyric acid type A-associated benzodiazepine-binding site, D1 Dopamine receptor type 1, D2 Dopamine receptor type 2, 4-DAMP 1,1-Dimethyl-4-diphenylacetoxypiperidinium iodide, EDTA Ethylenediaminetetraacetic acid, GABA A γ-Aminobutyric acid receptor type A, GABA B γ-Aminobutyric acid receptor type B, Gpp(NH)p 5′-guanylimidodiphosphate, 5-HT 1A Serotonin receptor type 1A, 5-HT 2 Serotonin receptor type 2, KBr Potassium bromide, KSCN Potassium thiocyanate, M 1, M 2 , and M 3 Muscarinic cholinergic receptor types 1, 2, and 3, mGlu2/3 Metabotropic glutamate receptor type 2/3, MK-801 Dizocilpine, nACh Nicotinic cholinergic receptor of the α4/β2 type, NMDA N-methyl-d-aspartate, 8-OH-DPAT 8-Hydroxy-2-(dipropylamino)tetralin, pBZ Peripheral benzodiazepine receptor, PMSF Phenylmethylsulfonyl fluoride, R-PIA N 6-R-phenylisopropyladenosine, SYM 2081 (2S,4R)-4-Methylglutamic acid
  2. a Final rinsing was carried out in incubation buffer at 4 °C, followed by one to three dips in distilled water at room temperature, unless otherwise specified
  3. b Substance included only in the main incubation buffer solution